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Ch 4: Genetic Influences in Human Development

About This Chapter

Discover how human development can be influenced by genetics in these lessons. Allow the chapter to help you memorize definitions so that you can prepare for an upcoming exam, improve your grades, or earn CE credits.

Genetic Influences in Human Development - Chapter Summary

While a multitude of external elements will influence our social, psychological, and physical development, our genetics also play a major role. These lessons explore how our own genetics may influence different aspects of development throughout our lives.

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When you have completed all the lessons from this chapter, you should be able to do the following:

  • Describe the basic concepts of genetics
  • Identify sex-limited and sex-linked traits
  • Analyze Turner, XYY, Klinefelter, and Trisomy X syndromes
  • Check out the genetic causes and treatments for Huntington's disease
  • Define the phenotypic and penetrance variability of genetic disorders
  • Compare various kinds of natural selection
  • Examine behavioral genetics
  • Learn about single gene-pair, polygenic, and sex-linked inheritance
  • Point out how genetic abnormalities impact development and growth
  • Offer examples of how the environment and genetics affect development

12 Lessons in Chapter 4: Genetic Influences in Human Development
Overview of Genetics

1. Overview of Genetics

We view manipulation of genes in our crops and livestock as a recent development. Yet, man has been manipulating the genetic makeup of his food for thousands of years through cultivation and breeding. This lesson will begin to help you understand how genetics works.

Exceptions to Independent Assortment: Sex Linked and Sex Limited Traits

2. Exceptions to Independent Assortment: Sex Linked and Sex Limited Traits

More men are color blind compared women. But often, not every brother, cousin or uncle in a family tree is color blind. Why not? How can genetics explain this seemingly complex inheritance pattern?

Turner Syndrome and Trisomy X: Types of Sex Chromosome Aneuploidy

3. Turner Syndrome and Trisomy X: Types of Sex Chromosome Aneuploidy

Most females have two X chromosomes, which is what makes them women. But, what happens when there are more or less than two X chromosomes in a woman's DNA? In this lesson, we'll explore Turner syndrome and trisomy X.

Klinefelter and XYY Syndrome: Types of Sex Chromosome Aneuploidy

4. Klinefelter and XYY Syndrome: Types of Sex Chromosome Aneuploidy

Most boys and men have two sex chromosomes. But, what happens when a male has more than two sex chromosomes? In this lesson, we'll explore two examples of male aneuploidy: Klinefelter syndrome and XYY syndrome.

What Is Huntington's Disease? - Symptoms, Genetic Cause & Treatment

5. What Is Huntington's Disease? - Symptoms, Genetic Cause & Treatment

In this lesson, you'll learn about a neurodegenerative disorder called Huntington's disease. You'll learn what a CAG repeat is and how the number of these repeats can be used to predict whether or not a person will get Huntington's disease.

Genetic Disorders: Penetrance & Phenotypic Variability

6. Genetic Disorders: Penetrance & Phenotypic Variability

Did you know that sometimes a dominant human genetic condition will skip a generation in a family? It does happen, and some dominant genetic conditions will also have a wide range of phenotypes, sometimes even within the same family. Learn more in this lesson about phenotypic variability!

Types of Natural Selection

7. Types of Natural Selection

We'll take a look at the types of natural selection that can occur. From flying hamsters to moths, you'll start to grasp the different paths organisms can take as they respond to their changing environments over time.

Behavioral Genetics

8. Behavioral Genetics

Are you destined to inherit your mother's penchant for collecting old postcards or your father's constant worry that something bad is about to happen? Find out with this lesson, which delves into the world of genetic and environmental behaviors and personality traits.

The Influence of Single Gene-Pair Inheritance on Development

9. The Influence of Single Gene-Pair Inheritance on Development

What is single gene-pair inheritance? What influence does it have on human development? Learn the answers to these questions as we explore this area of genetic inheritance in this video lesson.

The Influence of Sex-Linked and Polygenic Inheritance on Development

10. The Influence of Sex-Linked and Polygenic Inheritance on Development

What is sex-linked inheritance? What influence does it have on human development? What does it mean if a trait is polygenic? Learn the answers to these questions as this lesson explores this area of genetic inheritance.

Genetic Abnormalities in Human Growth and Development

11. Genetic Abnormalities in Human Growth and Development

What are mutations and other chromosome abnormalities? How can these abnormalities affect human development? What are some common genetic disorders and their causes? Learn the answers to these questions in this lesson.

How Genetics and the Environment Interact in Human Development

12. How Genetics and the Environment Interact in Human Development

Everyone is different. But what makes a person unique? In this lesson, we'll examine the way genes and the environment affect who a person is, including looking at the nature vs. nurture debate and looking at how nature and nurture influence one another.

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